This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A058828 #20 Dec 06 2022 07:56:35
%S A058828 1,305,761,1357,3793,4027,85481
%N A058828 Numbers k such that 6^k + k is prime.
%C A058828 The next terms are > 12000. - _Bruno Berselli_, Sep 30 2012
%C A058828 a(8) exceeds 120,000 (from Mischa Rodermond). - _Jeppe Stig Nielsen_, Dec 05 2022
%H A058828 Henri Lifchitz and Renaud Lifchitz, <a href="http://www.primenumbers.net/prptop/searchform.php?form=6%5Ek%2Bk">PRP Top: Search for 6^k+k</a>, finds a(7).
%t A058828 Do[ If[ PrimeQ[6^n + n], Print[n] ], {n, 2500} ]
%t A058828 Select[Range[0, 4000], PrimeQ[(6^# + #)] &] (* _Vincenzo Librandi_, Sep 29 2012 *)
%o A058828 (PARI) is(n)=ispseudoprime(6^n+n) \\ _Charles R Greathouse IV_, Jun 13 2017
%K A058828 nonn
%O A058828 1,2
%A A058828 _Robert G. Wilson v_, Jan 04 2001
%E A058828 a(5) from _Vincenzo Librandi_, Sep 29 2012
%E A058828 a(6) from _Bruno Berselli_, Sep 29 2012
%E A058828 a(7) from _Jeppe Stig Nielsen_, Dec 05 2022